Macvlan Error Causing Unraid System Inaccessibility

[BOGu]

 Hello everyone,

I'm encountering a critical issue with my unRAID system, and I could really use some assistance in troubleshooting it. The problem has been causing my system to become inaccessible, and I'm getting the following error message in my logs:

Jul 24 16:51:30 HOME-unRAID kernel: ------------[ cut here ]------------
Jul 24 16:51:30 HOME-unRAID kernel: WARNING: CPU: 4 PID: 12624 at net/netfilter/nf_conntrack_core.c:1210 __nf_conntrack_confirm+0xa4/0x2b0 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: Modules linked in: macvlan xt_CHECKSUM ipt_REJECT nf_reject_ipv4 ip6table_mangle iptable_mangle vhost_net tun vhost vhost_iotlb tap veth nfsd auth_rpcgss oid_registry lockd grace sunrpc xt_nat xt_tcpudp xt_conntrack nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype br_netfilter xfs md_mod zfs(PO) zunicode(PO) zzstd(O) zlua(O) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) tcp_diag inet_diag ip6table_nat iptable_nat xt_MASQUERADE nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 wireguard curve25519_x86_64 libcurve25519_generic libchacha20poly1305 chacha_x86_64 poly1305_x86_64 ip6_udp_tunnel udp_tunnel libchacha ip6table_filter ip6_tables iptable_filter ip_tables x_tables efivarfs 8021q garp mrp bridge stp llc bonding tls igb intel_rapl_msr intel_rapl_common iosf_mbi intel_pmc_core_pltdrv intel_pmc_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel mgag200 sha512_ssse3 drm_shmem_helper
Jul 24 16:51:30 HOME-unRAID kernel: ipmi_ssif aesni_intel drm_kms_helper crypto_simd cryptd drm rapl backlight intel_cstate syscopyarea nvme sysfillrect ahci i2c_algo_bit mei_me sysimgblt acpi_ipmi intel_uncore fb_sys_fops i2c_core mei nvme_core libahci intel_pch_thermal wmi ipmi_si acpi_tad acpi_power_meter button unix [last unloaded: igb]
Jul 24 16:51:30 HOME-unRAID kernel: CPU: 4 PID: 12624 Comm: kworker/u24:13 Tainted: P           O       6.1.38-Unraid #2
Jul 24 16:51:30 HOME-unRAID kernel: Hardware name: HPE ProLiant MicroServer Gen10 Plus/ProLiant MicroServer Gen10 Plus, BIOS U48 01/12/2023
Jul 24 16:51:30 HOME-unRAID kernel: Workqueue: events_unbound macvlan_process_broadcast [macvlan]
Jul 24 16:51:30 HOME-unRAID kernel: RIP: 0010:__nf_conntrack_confirm+0xa4/0x2b0 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: Code: 44 24 10 e8 e2 e1 ff ff 8b 7c 24 04 89 ea 89 c6 89 04 24 e8 7e e6 ff ff 84 c0 75 a2 48 89 df e8 9b e2 ff ff 85 c0 89 c5 74 18 <0f> 0b 8b 34 24 8b 7c 24 04 e8 18 dd ff ff e8 93 e3 ff ff e9 72 01
Jul 24 16:51:30 HOME-unRAID kernel: RSP: 0018:ffffc90000200d98 EFLAGS: 00010202
Jul 24 16:51:30 HOME-unRAID kernel: RAX: 0000000000000001 RBX: ffff8883ed873e00 RCX: df39c6a6af487b6b
Jul 24 16:51:30 HOME-unRAID kernel: RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8883ed873e00
Jul 24 16:51:30 HOME-unRAID kernel: RBP: 0000000000000001 R08: 594bdfbccc8db56d R09: b04b8ad271ad270a
Jul 24 16:51:30 HOME-unRAID kernel: R10: 111bd9a8ef71afa8 R11: ffffc90000200d60 R12: ffffffff82a11d00
Jul 24 16:51:30 HOME-unRAID kernel: R13: 000000000001f16e R14: ffff8881c9b67500 R15: 0000000000000000
Jul 24 16:51:30 HOME-unRAID kernel: FS:  0000000000000000(0000) GS:ffff88846eb00000(0000) knlGS:0000000000000000
Jul 24 16:51:30 HOME-unRAID kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jul 24 16:51:30 HOME-unRAID kernel: CR2: 0000564f588bd000 CR3: 00000001dab62001 CR4: 00000000003706e0
Jul 24 16:51:30 HOME-unRAID kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jul 24 16:51:30 HOME-unRAID kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Jul 24 16:51:30 HOME-unRAID kernel: Call Trace:
Jul 24 16:51:30 HOME-unRAID kernel: <IRQ>
Jul 24 16:51:30 HOME-unRAID kernel: ? __warn+0xab/0x122
Jul 24 16:51:30 HOME-unRAID kernel: ? report_bug+0x109/0x17e
Jul 24 16:51:30 HOME-unRAID kernel: ? __nf_conntrack_confirm+0xa4/0x2b0 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: ? handle_bug+0x41/0x6f
Jul 24 16:51:30 HOME-unRAID kernel: ? exc_invalid_op+0x13/0x60
Jul 24 16:51:30 HOME-unRAID kernel: ? asm_exc_invalid_op+0x16/0x20
Jul 24 16:51:30 HOME-unRAID kernel: ? __nf_conntrack_confirm+0xa4/0x2b0 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: ? __nf_conntrack_confirm+0x9e/0x2b0 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: ? nf_nat_inet_fn+0x60/0x1a8 [nf_nat]
Jul 24 16:51:30 HOME-unRAID kernel: nf_conntrack_confirm+0x25/0x54 [nf_conntrack]
Jul 24 16:51:30 HOME-unRAID kernel: nf_hook_slow+0x3a/0x96
Jul 24 16:51:30 HOME-unRAID kernel: ? ip_protocol_deliver_rcu+0x164/0x164
Jul 24 16:51:30 HOME-unRAID kernel: NF_HOOK.constprop.0+0x79/0xd9
Jul 24 16:51:30 HOME-unRAID kernel: ? ip_protocol_deliver_rcu+0x164/0x164
Jul 24 16:51:30 HOME-unRAID kernel: __netif_receive_skb_one_core+0x77/0x9c
Jul 24 16:51:30 HOME-unRAID kernel: process_backlog+0x8c/0x116
Jul 24 16:51:30 HOME-unRAID kernel: __napi_poll.constprop.0+0x28/0x124
Jul 24 16:51:30 HOME-unRAID kernel: net_rx_action+0x159/0x24f
Jul 24 16:51:30 HOME-unRAID kernel: __do_softirq+0x126/0x288
Jul 24 16:51:30 HOME-unRAID kernel: do_softirq+0x7f/0xab
Jul 24 16:51:30 HOME-unRAID kernel: </IRQ>
Jul 24 16:51:30 HOME-unRAID kernel: <TASK>
Jul 24 16:51:30 HOME-unRAID kernel: __local_bh_enable_ip+0x4c/0x6b
Jul 24 16:51:30 HOME-unRAID kernel: netif_rx+0x52/0x5a
Jul 24 16:51:30 HOME-unRAID kernel: macvlan_broadcast+0x10a/0x150 [macvlan]
Jul 24 16:51:30 HOME-unRAID kernel: ? _raw_spin_unlock+0x14/0x29
Jul 24 16:51:30 HOME-unRAID kernel: macvlan_process_broadcast+0xbc/0x12f [macvlan]
Jul 24 16:51:30 HOME-unRAID kernel: process_one_work+0x1a8/0x295
Jul 24 16:51:30 HOME-unRAID kernel: worker_thread+0x18b/0x244
Jul 24 16:51:30 HOME-unRAID kernel: ? rescuer_thread+0x281/0x281
Jul 24 16:51:30 HOME-unRAID kernel: kthread+0xe4/0xef
Jul 24 16:51:30 HOME-unRAID kernel: ? kthread_complete_and_exit+0x1b/0x1b
Jul 24 16:51:30 HOME-unRAID kernel: ret_from_fork+0x1f/0x30
Jul 24 16:51:30 HOME-unRAID kernel: </TASK>
Jul 24 16:51:30 HOME-unRAID kernel: ---[ end trace 0000000000000000 ]---

My system details are as follows:

unRAID version: 6.1.38

Hardware: HPE ProLiant MicroServer Gen10 Plus/ProLiant MicroServer Gen10 Plus

BIOS version: U48 (updated on 01/12/2023)

The issue seems to be related to nf_conntrack based on the log entry. I am not certain what exactly caused this error or how to go about resolving it.

I've attempted some basic troubleshooting steps like rebooting the system and checking for any recent changes to plugins or configurations, but the problem persists.

I'm hoping that someone in the community can help shed some light on this matter and guide me towards a solution. If you need any additional information or logs, please let me know, and I'll provide them promptly.

Thank you in advance for your time and support. Any assistance will be greatly appreciated!

Best regards,

[JorgeB]

Switching to ipvlan should fix it (Settings -> Docker Settings -> Docker custom network type -> ipvlan (advanced view must be enabled, top right)).